分散液液微萃取过程中内分泌干扰物在离子液体/水相体系中的分配行为

J4 ›› 2010, Vol. 48 ›› Issue (02): 339-345.

• 环境科学 • 上一篇

分散液液微萃取过程中内分泌干扰物在离子液体/水相体系中的分配行为

刘建林, 张琛, 杜显元, 高茜, 李鱼

华北电力大学能源与环境研究中心, 北京 102206

收稿日期:2009-06-23 出版日期:2010-03-26 发布日期:2010-03-22
通讯作者: 李鱼 E-mail:liyuxx@jlu.edu.cn

Partitioning of Endocrine Disrupting Compounds betweenIonic Liquid and Aqueous Phase in the Dispersive LiquidLiquidMicroextraction Process

LIU Jianlin, ZHANG Chen, DU Xianyuan, GAO Qian, LI Yu

Energy and Environmental Research Centre, North China Electric Power University, Beijing 102206, China

Received:2009-06-23 Online:2010-03-26 Published:2010-03-22
Contact: LI Yu E-mail:liyuxx@jlu.edu.cn

摘要/Abstract

摘要：

以离子液体（［C₆MIM］PF₆）作萃取剂、甲醇为分散剂, 对水样中的内分泌干扰物（雌三醇(E3)、双酚A(BPA)、 17α-炔基雌二醇(EE2)、雌二醇(E2)、雌酮(E1))进行分散液液微萃取, 比较了内分泌干扰物在［C₆MIM］PF₆/水相和传统有机萃取剂/水相的分配系数, 利用NRTL方程对内分泌干扰物在萃取相/水相中平衡分配的摩尔分数进行了关联, 并对［C₆MIM］PF₆萃取内分泌干扰物的过程进
行了机理分析. 结果表明, 在所考察的浓度范围内, 内分泌干扰物在［C₆MIM］PF₆/水相中的分配规律为D_EE2>D_BPA>D_E1>D_E2>D_E3, 内分泌干扰物在［C₆MIM］PF₆/水相中的分配系数均显著高于其在传统有机萃取剂/水相中的分配系数, NRTL方程验证了内分泌干扰物与萃取剂及溶剂分子间相互作用能的大小.

关键词: 分散液-液微萃取；内分泌干扰物；离子液体；分配系数； NRTL方程

Abstract:

Extraction of the endocrine disrupting compounds (EDCs, such as estriol, bisphenol A, 17α-ethynylestradiol, estradiol and estrone) in water was investigated based on dispersive liquidliquid microextraction procedure with ionic liquid (［C₆MIM］PF₆) as extraction solvent and methanol as dispersive solvent. The distribution coefficients of EDCs between ionic liquid and aqueous phase were compared with those of EDCs between conventional organic solvent and aqueous phase, and the equilibrium molar fractions of EDCs in the system of ［C₆MIM］PF₆water were correlated with the help of the wellknown NRTL equation, and finally, the mechanism of extraction reaction between［C₆MIM］PF₆ and EDCs was discussed as well. The experimental results show that the highest distribution coefficients of EDCs between ［C₆MIM］PF₆ and aqueous phase were D_EE2, followed by D_BPA,D_E1,D_E2 and D_E3 in the studied concentration range, and the distribution coefficients of EDCs in the system of ［C₆MIM］PF₆/water was much higher than that in the system of conventional organic solvent/water, and the molecular interactions among EDCsextraction solventwater were validated by NRTL equation.

Key words: dispersive liquidliquid microextraction, endocrine disrupting compounds, ionic liquid, distribution coefficient, NRTL equation

中图分类号:

X132

刘建林, 张琛, 杜显元, 高茜, 李鱼. 分散液液微萃取过程中内分泌干扰物在离子液体/水相体系中的分配行为[J]. J4, 2010, 48(02): 339-345.

LIU Jian-Lin, ZHANG Chen, DU Xian-Yuan, GAO Qian, LI Yu. Partitioning of Endocrine Disrupting Compounds betweenIonic Liquid and Aqueous Phase in the Dispersive LiquidLiquidMicroextraction Process[J]. J4, 2010, 48(02): 339-345.

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分散液液微萃取过程中内分泌干扰物在离子液体/水相体系中的分配行为

Partitioning of Endocrine Disrupting Compounds betweenIonic Liquid and Aqueous Phase in the Dispersive LiquidLiquidMicroextraction Process

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